TRUST EVALUATION METHOD AND SYSTEM IN INTERNET OF THINGS

According to one example embodiment, trust evaluation system may include a collection unit collecting internal data and external data; a calculation unit calculating reputation and interactional reciprocity of entity using the internal data or external data and calculating trust of the entity based on the calculated reputation and interactional reciprocity; a process unit determining whether the entity is trustable and access to the entity is permitted by comparing the calculated trust of the entity with a threshold value and reporting to an owner of IoT system a determination result; and an update unit updating the threshold value for the entity based on the determination result.